Amundi Pioneer Institutional Asset Management, Inc. – ‘13F-NT/A’ for 9/30/12

On:  Thursday, 12/13/12, at 4:40pm ET   ·   Effective:  12/13/12   ·   For:  9/30/12   ·   Accession #:  1102598-12-155   ·   File #:  28-13329

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Amendment to Quarterly Holdings Notice by a Money Manager   —   Form 13F
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 13F-NT/A    Q3 13F Amended                                         2      7K 

13F-NT/A
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 UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 13F
 FORM 13F Cover Page

        Report for the Calendar Year or Quarter Ended September 30, 2012

If amended report check here:      |X|                    Amendment Number:1    

This Amendment (Check only one):   |X| is a restatement                         
          | | adds new holding
        entries.

Pioneer Institutional Asset Management, Inc.                                    
--------------------------------------------------------------------------------
Name of Institutional Investment Manager                                        

60 State Street                         Boston             MA           02109   
--------------------------------------------------------------------------------
Business Address         (Street)       (City)            (State)          (Zip)

13F File Number: 28-13329                                                       

The institutional investment manager filing this report and the person by whom  
it is signed hereby represent that the person signing the report is authorized  
to submit it, that all information contained herein is true, correct and        
complete, and that it is understood that all required items, statements,        
schedules, lists, and tables, are considered integral parts of this form.       

Person Signing this Report on Behalf of Reporting Manager:                      

Terrence J. Cullen           Chief Legal Officer                   617-422-4379 
--------------------------------------------------------------------------------
Name                               (Title)                            (Phone)   

                                /s/ Terrence J. Cullen
                                      ------------------------------------------
                                      (Manual Signature of Person Duly
                                       Authorized to Submit This Report)

                                         Boston, MA    December 13, 2012
                                      ------------------------------------------
                                       (Place and Date of Signing)

Report Type:                                                                    

[ ] 13F HOLDINGS REPORT.                                                        

[X] 13F NOTICE.                                                                 

[ ] 13F COMBINATION REPORT.                                                     

List of Other Managers Reporting for this Manager:                              

Form 13F File Number:                   Name:                                   
-----------------------------------------------------------------------------   
28-04037                        Pioneer Investment Management, Inc.             

13F-NT/A
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 Form 13F SUMMARY PAGE

Report Summary:                                                                 

Number of Other Included Managers:        0                                     

Form 13F Information Table Entry Total:   0                                     

Form 13F Information Table Value Total:   $0                                    
               (thousands)

List Of Other Included Managers:                                                
NONE                                                                            

Dates Referenced Herein   and   Documents Incorporated by Reference

				Referenced-On Page
This ‘13F-NT/A’ Filing		Date		First		Last			Other Filings
Filed on / Effective on:		12/13/12		1
For Period end:		9/30/12		1					13F-NT,  13F-NT/A
									List all Filings